(19)
(11) EP 0 223 452 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
30.08.1989 Bulletin 1989/35

(43) Date of publication A2:
27.05.1987 Bulletin 1987/22

(21) Application number: 86308397.8

(22) Date of filing: 29.10.1986
(51) International Patent Classification (IPC)4: C12N 15/00, C12N 15/11, A01H 1/00, C12N 1/20, C12N 5/00, C12N 15/82
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR IT LI LU NL SE

(30) Priority: 29.10.1985 US 792389
27.03.1986 US 844918
09.10.1986 US 917027

(71) Applicants:
  • Monsanto Company
    St. Louis Missouri 63167-7020 (US)
  • WASHINGTON UNIVERSITY
    St. Louis, Missouri 63130-4899 (US)

(72) Inventors:
  • Beachy, Roger N.
    Ladue, MI 63124 (US)
  • Fraley, Robert T.
    St. Louis, MI 63131 (US)
  • Rogers, Stephen G.
    Chesterfield, MI 63017 (US)

(74) Representative: Hildyard, Edward Martin et al
Frank B. Dehn & Co., European Patent Attorneys, 179 Queen Victoria Street
London EC4V 4EL
London EC4V 4EL (GB)


(56) References cited: : 
   
     
    Remarks:
    A request for correction of figures 4, 13 and 17 has been filed pursuant to Rule 88 EPC. A decision on the request will be taken during the proceedings before the Examining Division (Guidelines for Examination in the EPO, A-V, 2.2).
     


    (54) Protection of plants against viral infection


    (57) A process for producing genetically transformed plants which are resistant to infection by a plant virus, comprises the steps of:

    (a) inserting into the genome of a plant cell a recombinant, double-stranded DNA molecule comprising

    (i) a promoter which functions in plant cells to cause the production of RNA sequences of said plant virus;

    (ii) a DNA sequence that corresponds to an RNA sequence of said plant virus.

    (iii) a 3' non-translated region which functions in plant cells to cause the addition of polyadenylated nucleotides to the 3' end of said RNA sequence;

    (b) obtaining transformed plant cells; and

    (c) regenerating from the transformed plant cells genetically transformed plants which have increased resistance to infection by said plant virus.





    Search report